v1.6.0

FFT spectrum

Render a two-tone signal and inspect its frequency-domain peaks.

npx web-audio-api fft
f1=<hz>
first tone
f2=<hz>
second tone
fft=<size>
analyser resolution
ready

Other examples

39Linked AudioParamsDrive multiple gain parameters from one ConstantSourceNode.Measure 35Speaker hello worldPlay the smallest useful realtime graph through the system output.Create 36LFO tremoloConnect an oscillator to an AudioParam and modulate gain at audio-clock precision.Create 37Spatial panningMove a source from left to right through three-dimensional space.Create

This is an FFT spectrum analyzer example: a two-tone signal is rendered offline and inspected with an AnalyserNode to find its frequency-domain peaks. Run it from the Node CLI, or open it in the browser to render and inspect the same spectrum.